Laboratory testing of displacement and load induced fretting

Effect of the metal concentration on the structural, mechanical and tribological properties of self-organized a-C:Cu hard nanocomposite coatings

“…The corundum ball counterbody ( -Al 2 O 3 , producer: Ceratec (NL), =10mm), renewed after each single test, was oscillated at a frequency of 5 Hz at 21 ºC and a relative humidity of 50 % using an experimental setup described in detail elsewhere [27]. The experiments were conducted with a normal load of 2 N, 5 N, and 10 N for a total number of 10000 cycles.…”

“…Fretting wear takes place when two contacting solid materials undergo a relatively small amplitude oscillating displacement [27]. The main characteristic of the wear produced during reciprocating sliding (fretting tests) is that the size of the contact area of the film exposed to the atmosphere depends on the vibration amplitude, while the contact zone of the spherical counterbody, never contacts with the environment [28].…”

Advanced Nanomechanical Test Techniques

“…In such configuration, the ball is subjected to normal load (P) or rotational load (Pr), Fig. 20, and three fretting modes can be distinguished [62]: Most published research is focused on fretting mode I because the wear and friction mechanisms in that case are described by similar laws as sliding friction. However, other modes are also encountered in industrial applications and need to be investigated as well.…”

Study of Factors Affecting Taper Joint Failures in Modular Hip Implant Using Finite Element Modelling

“…Value used were KN = 100*E and KS = 0.01*KN; after being tried and found to reduce the run time without affecting the stress and micromotion results. Elastic Coulomb friction was used because practical fretting couples exhibit dual micromotion regimes, normally referred to as elastic regime and gross slip regime (Zhou and Vicent, 1995;Mohrbacher et al, 1995). The values for the coefficient friction () used in various analyses models were based on expermental measurements reported by Fessler and Fricker (1989) and the data from Budinski (1991).…”

“…The key parameter to fretting is slip amplitude which is defined as the peak-to-peak amplitude of the relative reversible micro-movement of the surfaces (Mohrbacher et al, 1995;Waterhouse, 1992).…”